Raccoon roundworm eggs deposited outdoors may remain alive up to how many years?

• A. 1 year
• B. 5 years
• C. 7 years
• D. 10 years

Answer: (D)

Raccoon roundworm eggs are incredibly hardy once deposited outdoors. Their thick, protective shells let them survive a wide range of environmental conditions—drying, cold, heat, and even some sun exposure—so they can stay viable for many years. In outdoor settings, they can remain alive and infectious for up to about ten years. That long persistence means areas where raccoons have den or leave feces can pose a zoonotic risk for a very long time, so when rehab workers encounter potentially contaminated soil or surfaces, they should use protective gear and follow thorough decontamination and sanitation practices.